<template>
    <div>
        <!--面包屑导航区域-->
        <el-breadcrumb separator-class="el-icon-arrow-right">
            <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
            <el-breadcrumb-item>商品管理</el-breadcrumb-item>
            <el-breadcrumb-item>参数列表</el-breadcrumb-item>
        </el-breadcrumb>
        <!--卡片视图区域-->
        <el-card>
            <!--头部的警告区域-->
            <el-alert
                    title="注意：只允许为第三级分类设置相关参数！"
                    type="warning"
                    :closable="false"
                    show-icon>
            </el-alert>

            <!-- 选择商品分类区域 -->
            <el-row class="cat_opt">
                <el-col>
                    <span>
                        选择商品分类：
                    </span>
                    <!--选择商品分类的级联选择框-->
                    <el-cascader
                            v-model="selectedCateKeys"
                            :options="cateList"
                            :props="cateProps"
                            @change="handleChange">

                    </el-cascader>
                </el-col>
            </el-row>

            <!--tab页签区域-->
            <el-tabs v-model="activeName" @tab-click="handleTabClick">

                 <!--添加动态参数面板-->
                <el-tab-pane label="动态参数" name="many">
                    <el-button @click="addDialogVisible=true" :disabled="isBtnDisabled" size="mini" type="primary">
                        添加参数
                    </el-button>
                    <!--动态参数表格-->
                    <el-table :data="manyTableData" border stripe>
                        <!--展开行-->
                        <el-table-column type="expand">
                            <!--通过作用域插槽来接收数据-->
                            <template slot-scope="scope">
                                <!--循环渲染Tag标签-->
                                <el-tag @close="handleClose(i,scope.row)" closable v-for="(item,i) in scope.row.attr_vals" :key="i">
                                    {{item}}
                                </el-tag>

                                <!--输入文本框-->
                                <el-input
                                        class="input-new-tag"
                                        v-if="scope.row.inputVisible"
                                        v-model="scope.row.inputValue"
                                        ref="saveTagInput"
                                        size="small"
                                        @keyup.enter.native="handleInputConfirm(scope.row)"
                                        @blur="handleInputConfirm(scope.row)">
                                </el-input>

                                <!--添加Tag的按钮-->
                                <el-button v-else class="button-new-tag" size="small" @click="showInput(scope.row)">+ New Tag</el-button>
                                +++{{scope.row.inputVisible}}+++

                            </template>
                        </el-table-column>
                        <el-table-column type="index">
                        </el-table-column>
                        <el-table-column prop="attr_name" label="参数名称">

                        </el-table-column>
                        <el-table-column label="操作">
                            <template slot-scope="scope">
                                <el-button @click="showEditDialog(scope.row.attr_id)" size="mini" type="primary" icon="el-icon-edit">编辑</el-button>
                                <el-button @click="removeParams(scope.row.attr_id)" size="mini" type="danger" icon="el-icon-delete">删除</el-button>
                            </template>
                        </el-table-column>
                    </el-table>
                </el-tab-pane>


                <!--添加属性按钮-->
                <el-tab-pane label="静态属性" name="only">
                    <el-button @click="addDialogVisible=true" :disabled="isBtnDisabled" size="mini" type="primary">
                        添加属性
                    </el-button>
                    <!--静态属性表格-->
                    <el-table :data="onlyTableData" border stripe>
                        <!--展开行-->
                        <el-table-column type="expand">
                            <!--通过作用域插槽来接收数据-->
                            <template slot-scope="scope">
                                <!--循环渲染Tag标签-->
                                <el-tag @close="handleClose(i,scope.row)" closable v-for="(item,i) in scope.row.attr_vals" :key="i">
                                    {{item}}
                                </el-tag>

                                <!--输入文本框-->
                                <el-input
                                        class="input-new-tag"
                                        v-if="scope.row.inputVisible"
                                        v-model="scope.row.inputValue"
                                        ref="saveTagInput"
                                        size="small"
                                        @keyup.enter.native="handleInputConfirm(scope.row)"
                                        @blur="handleInputConfirm(scope.row)">
                                </el-input>

                                <!--添加Tag的按钮-->
                                <el-button v-else class="button-new-tag" size="small" @click="showInput(scope.row)">+ New Tag</el-button>
                                +++{{scope.row.inputVisible}}+++

                            </template>
                        </el-table-column>

                        <el-table-column type="index">
                        </el-table-column>
                        <el-table-column prop="attr_name" label="属性名称">

                        </el-table-column>
                        <el-table-column label="操作">
                            <template slot-scope="scope">
                                <el-button  @click="showEditDialog(scope.row.attr_id)" size="mini" type="primary" icon="el-icon-edit">编辑</el-button>
                                <el-button @click="removeParams(scope.row.attr_id)" size="mini" type="danger" icon="el-icon-delete">删除</el-button>
                            </template>
                        </el-table-column>
                    </el-table>

                </el-tab-pane>
            </el-tabs>
        </el-card>

        <!--添加参数的对话框-->
        <el-dialog
                :title="'添加'+titleText"
                :visible.sync="addDialogVisible"
                width="50%"
                @close="addDialogClosed">

            <!--添加参数的对话框-->
            <el-form :model="addForm" :rules="addFormRules" ref="addFormRef" label-width="100px">
                <el-form-item :label="titleText" prop="attr_name">
                    <el-input v-model="addForm.attr_name"></el-input>
                </el-form-item>
            </el-form>

            <span slot="footer" class="dialog-footer">
                 <el-button @click="addDialogVisible = false">取 消</el-button>
                 <el-button type="primary" @click="addParams">确 定</el-button>
            </span>
        </el-dialog>

        <!--修改参数的对话框-->
        <el-dialog
                :title="'修改'+titleText"
                :visible.sync="editDialogVisible"
                width="50%"
                @close="editDialogClosed">

            <!--添加参数的对话框-->
            <el-form :model="editForm" :rules="editFormRules" ref="editFormRef" label-width="100px">
                <el-form-item :label="titleText" prop="attr_name">
                    <el-input v-model="editForm.attr_name"></el-input>
                </el-form-item>
            </el-form>

            <span slot="footer" class="dialog-footer">
                 <el-button @click="editDialogVisible = false">取 消</el-button>
                 <el-button type="primary" @click="editParams">确 定</el-button>
            </span>
        </el-dialog>
    </div>
</template>
<script>
  export default {
    name: "params",
    data(){
      return {
        cateList:[],
        //级联选择框的配置对象
        cateProps:{
            value:"cat_id",
            label:"cat_name",
            children:"children",
            //触发方式
            expandTrigger: 'hover'
        },
        //级联选择框双向绑定到的数组
        selectedCateKeys:[],
        //被激活的页签名称
        activeName:"many",
        //动态参数的数据
        manyTableData:[],
        //静态参数的数据
        onlyTableData:[],
        //控制添加对话框的显示与隐藏
        addDialogVisible:false,
        //添加参数的表单数据对象
        addForm:{
          attr_name:""
        },
        //添加表单的验证规则对象
        addFormRules:{
          attr_name:[
            {
               required:true,
               message:"请输入参数名称",
               trigger:"blur"
            }
          ]
        },
        //控制修改对话框的显示与隐藏
        editDialogVisible:false,
        //修改的表单数据对象
        editForm:{},
        //修改表单的验证规则对象
        editFormRules:{
          attr_name:[
            {
              required:true,
              message:"请输入参数名称",
              trigger:"blur"
            }
          ]
        }
      }
    },
    created(){
      this.getCateList();
    },
    methods:{
      //获取所有的商品分类列表
      async getCateList(){
        const res01=await this.$http.get("categories");
        console.log("res01:",res01);
        if(res01.status!==200){
           this.$message.error("获取商品分类列表失败！")
        }

        this.cateList=res01.data.data;

      },
      //获取参数的列表数据
      async getParamsData(){
        //证明选中的不是三级分类
        if(this.selectedCateKeys.length!==3){
          this.selectedCateKeys=[];
          this.manyTableData=[];
          this.onlyTableData=[];
        }

        //证明选中的是三级分类
        console.log("selectedCateKeys:",this.selectedCateKeys);
        //根据 所选分类的id,和当前所处的面板，获取对应的参数
        const res001=await this.$http.get(`categories/${this.cateId}/attributes`,{params:{sel:this.activeName}});
        console.log("res001:",res001);
        if(res001.status!==200){
          return this.$message.error("获取参数列表失败！");
        }
        if(this.activeName==="many"){
          this.manyTableData=res001.data.data;
        }else{
          this.onlyTableData=res001.data.data;
        }

        //获取商品的关键字字符串 然后分割成数组 最后搞成tag
        res001.data.data.forEach(item=>{
          item.attr_vals =item.attr_vals?item.attr_vals.split(" "):[];

          //新添加的属性是无法响应到页面上的 所以要用到Vue.set()
          //https://www.cnblogs.com/IwishIcould/p/13994211.html
          // //控制文本框的显示与隐藏
          // item.inputVisible=false;
          // //文本框输入的值
          // item.inputValue="";

          this.$set(item,'inputVisible', false);
          this.$set(item,'inputValue', "");
        })
        console.log("res001.data.data:",res001.data.data);
      },
      //级联选择框选中变化,会触发这个函数
      handleChange(){
          this.getParamsData();
      },
      //tab页签点击事件的处理函数
      handleTabClick(){
        this.getParamsData();
        console.log("activeName:",this.activeName);
      },
      //监听添加对话框的关闭事件 清空数据
      addDialogClosed(){
        this.$refs.addFormRef.resetFields();
      },
      //点击按钮 添加参数
      addParams(){
        this.$refs.addFormRef.validate(async valid=>{
          if(!valid) return;
          const addPaRes = await this.$http.post(`categories/${this.cateId}/attributes`,{
            attr_name:this.addForm.attr_name,
            attr_sel:this.activeName
          });
          console.log("addPaRes:",addPaRes);
          if(addPaRes.status!==200){
             return this.$message.error("添加参数失败！");
          }

          this.$message.success("添加参数成功！");
          this.addDialogVisible=false;
          this.getParamsData();
        });
      },
      //点击按钮展示修改的对话框
      async showEditDialog(attr_id){
        //查询当前参数的信息
        const paramsInfo=await this.$http.get(`categories/${this.cateId}/attributes/${attr_id}`,{params:{attr_sel:this.activeName}});
        console.log("paramsInfo:",paramsInfo);
        if(paramsInfo.status!==200){
          return this.$message.error("获取参数信息失败！");
        }
        this.editForm=paramsInfo.data.data;
        this.editDialogVisible=true;
      },
      //重置修改的表单
      editDialogClosed(){
        this.$refs.editFormRef.resetFields();
      },
      //点击按钮修改参数信息
      editParams(){
        this.$refs.editFormRef.validate(async valid=>{
          if(!valid) return
          const editParamsRes=await this.$http.put(`categories/${this.cateId}/attributes/${this.editForm.attr_id}`,{
            attr_name:this.editForm.attr_name,
            attr_sel:this.activeName
          })

          console.log("editParamsRes:",editParamsRes);
          if(editParamsRes.status!==200){
            return this.$message.error("修改参数失败！");
          }

          this.$message.success("修改参数成功！");
          this.getParamsData();
        })
        this.editDialogVisible=false;
      },
      //根据id删除对应的参数项
      async removeParams(attr_id){
        const confirmRes01=await this.$confirm('此操作将永久删除该参数, 是否继续?', '提示', {
          confirmButtonText: '确定',
          cancelButtonText: '取消',
          type: 'warning'
        }).catch(err=>err)
        //用户取消了删除该操作
        if(confirmRes01=="cancel"){
          return this.$message.info("已取消删除！");
        }

        //删除的业务逻辑
        const confirmRes02=await this.$http.delete(`categories/${this.cateId}/attributes/${attr_id}`);
        console.log("confirmRes02:",confirmRes02);

        if(confirmRes02.status!==200){
          return this.$message.error("删除参数失败！");
        }

        this.$message.success("删除参数成功！");
        this.getParamsData();
      },
      //文本框失去焦点或按下enter键
      async handleInputConfirm(row){
        if(row.inputValue.trim().length===0){
          row.inputValue="";
          row.inputVisible=false;
          return
        }
        //如果没有return 用户输入了真实的类容 需要做后续处理
        row.attr_vals.push(row.inputValue.trim());
        row.inputValue="";
        row.inputVisible=false;
        this.saveAttrVals(row);
      },
      //将对attr_vals的操作保存到数据库
      async saveAttrVals(row){
        //发起请求 保存这次操作
        const biaoqianRes = await this.$http.put(`categories/${this.cateId}/attributes/${row.attr_id}`,{
          "attr_name": row.attr_name,
          "attr_sel": row.attr_sel,
          "attr_vals": row.attr_vals.join(" ")
        });

        console.log("biaoqianRes:",biaoqianRes);
        if(biaoqianRes.status!==200){
          return this.$message.error("修改标签失败！");
        }

        this.$message.success("修改标签成功！");
      },
      //点击按钮展示文本输入框
      showInput(row){
        row.inputVisible=true;
        console.log("row:",row);
        //让文本框自动获得焦点
        //$nextTick方法作用 就是当页面上的元素被重新渲染之后，才会
        //指定回调函数中的代码
        this.$nextTick(() => {
          this.$refs.saveTagInput.$refs.input.focus();
        });
      },
      //删除对应的参数可选项
      handleClose(i,row){
        row.attr_vals.splice(i,1);
        this.saveAttrVals(row);
      }
    },
    computed:{
      //如果按钮需要被禁用,则返回true,否则返回false
      isBtnDisabled(){
        if(this.selectedCateKeys.length!==3){
          return true;
        }
        return false;
      },
      //当前选中的三级分类的id
      cateId(){
         if(this.selectedCateKeys.length===3){
            return this.selectedCateKeys[2];
         }
         return null;
      },
      //动态计算标题的文本
      titleText(){
        if(this.activeName==="many"){
            return "动态参数";
        }else{
          return "静态属性";
        }
      }
    }
  }
</script>

<style lang="less" scoped>
   .cat_opt{
       margin-top: 15px;
   }

   .el-tag{
       margin: 5px;
   }

    .input-new-tag{
        width: 120px;
    }
</style>